Stripping machine



1934 E. w. COLLINS STRIPPING MACHINE Filed 001:. 5, 1931 5 Sheets-Sheet l INVENTOR. dam ,w- [$4.4m

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A TTORNE Y.

Aug, 1934- E. w. COLLINS STRIPPING' MACHINE Filed Oct. 5, 1931 5 Sheets-Sheet 2 INVENTOR.

ATTORNEY.

1934- E. w. COLLINS STRIPPING MACHINE Filed Oct. 5, 1931 3 Sheets-Sheet 5 I N VEN TOR.

A TTORNEY.

Patented Aug. 14, 1934 UNITED STATES PATENT OFFICE STRIPPIN G MACHINE ware Application October 5, 1931, Serial No. 566,861

6 Claims. (Cl. 15-21) This invention relates to machines for stripping insulation from the ends of wires, more particularly lead wires of formed coils.

An object of this invention is a stripping machine comprising two parallel shafts upon which annular steel brushes are mounted, the brushes engaging tangentially. The shafts are revolved at high speed and the ends of the wires to be stripped are passed between the brushes from 10 end to end of the latter so as to be engaged thereby and frictionally stripped.

Still further objects will readily occur to those skilled in the art upon reference to the following description and the accompanying drawings in which Fig. 1 is a view in elevation of the stripping machine, parts being omitted for purposes of clarity.

Fig. 2 is a top plan view of the machine.

Fig. 3 is a section as if on the line 3-3 of Fig. 2.

Fig. 4 is a partial elevation view as if along arrow 4 of Fig. 3.

Fig. 5 shows a coil whose leads are stripped in the machine of the invention.

Referring to the drawings, it will be seen that the machine includes a table supported on legs 12, and upon and from which all of the machine parts are to be supported. Journalled in spaced bearings 14, and 16, 17, on the top of the table are two parallel drive shafts 18, 19 upon which brushes are to be mounted. Each of the shafts, near the bearings 14, 15 is provided with a pulley 22 around which passes a belt or chain 24 driven by a pulley 26 on the shaft of the motor 28. There are two motors, and each of them is supported upon a plate 30 hingedly connected to the underside of the table 10 by a hinge pin 32, and adjustably positioned for belt tensioning by a stationary stud bolt 34 having a double nut adjustment 36.

In the ends of the drive shafts are recesses 40, Fig. 1, in which are disposed the ends of brush shafts 42, there being pins 44 connecting the brush shafts 42 and the drive shafts. Surrounding the brush shafts are bearing sleeves 46 which are drivingly connected with drive collars 48 by a groove and ridge connection 48a. The drive collars 48 have cooperating dog faced clutch formations 50 and the collars 48 are 50 pinned to the brush shafts 42 by pins 52. The

ends of the brush shafts are in the form of solid heads 54, between which and the drive collars 48 are keyed a plurality of cooperating ring brushes 56, there being a plurality of washers 58 for ;5 taking up the play left by the brushes between the collars 48 and the solid heads 54. The sleeves 46 are rotatable within the bearings 16. 17 and due to the driving connection between drive collars 48 and sleeves 46 the former are never subjected to wear but instead the simple replaceable sleeves 46.

The foregoing arrangement of the brush mounting facilitates brush replacement, which can be effected in the following manner: When the brushes are to be replaced, sleeves 59 surrounding the drive shafts are moved to the left (Fig. 1) exposing the pins 44 which are then driven thru to release the brush shafts 42 from the drive shafts. The brush shafts, together. with their drive collars 48 and brushes are then pulled outwardly (to the right of Fig. 1) and the pins 52 are driven thru to permit removal of drive collars 48, whereupon the ring brushes 56 may be slid off the brush shafts 42, over their small ends, opposite the heads 54. Other brushes may then be placed upon the shafts and these, together with their drive collars, are then slipped thru the sleeves 46 and into the recessed ends of the drive shafts. Pins 52 and 44 are replaced, collars 48 are clutched to sleeves 46, and sleeves 59 are moved to the right to complete the assembly.

Removably supported upon the table 10, upon legs 60, are a pair of guards or housings 62 for the brushes and shafts. These guards are U shaped in cross section and the space between them is exactly in line with the tangential intersection between the brushes (see Fig. 3), thus forming a track for the introduction and guiding of the wire ends as the latter pass thru the brushes for stripping. The guards may be removed, to permit brush replacement or for any other purpose as desired. It appears from Fig. 3 that the guards 62 partially cover the revolving brushes in such manner that they direct the stripped insulation thrown off the revolving brushes substantially vertically below the brushes, 1. e. out of the working region of the operator so that no flying insulation may impair proper supervision of the stripping operation by the operator.

It will be observed that the guards 62 are disposed at a small acute angle with respect to the axes of the shaft in order to cause the coils to pass between the brushes at a slight angle. Further, the adjacent faces of the guards are cut away, as indicated at 99, to provide clearance for the brushes.

The shaft 18 is not movable with respect. to the table 10 whereas the shaft 19, together with its brushes, is so mounted as to be movable towards the shaft 18 to compensate for wear in the brushes. Means for moving the shaft 19 is, therefore, provided and such means includes a flat leaf 70 (Fig. '2) having beveled sides 72-73 bearings 15 and 17, causing them to move towardsshaft 18, and thus move the brushes on shaft 19 towards those on shaft 18. Coiled springs 81.

and 82, between bearings 14 and 15, and 16 and 17, resist such movement and tend to maintain the shafts in proper alignment.

The operation of the machine will now be described:-

With the shafts and brushes rotating at high speed a stack of coils 92, having leads 93 and 94 and mounted upon a frame 95, is passed between the brushes from right to left, Fig. 1, one set of leads, being disposed between the guards 62 and the other set being disposedoutside of them. As the leads pass between the brushes. they are engaged by the latter and stripped, so that after they have passed thru the machine, they will have bared copper ends, substantially as indicated at 94, Fig. 5.

The frame 95 upon which the coils are stacked includes a plurality of wire rods 96, Fig. 8, arranged to form a quadrilateral. At one end, the frame has a plate 97, larger in area than the coils, which prevents the coils from slipping off the end of the frame. At the other end, the frame is small, being drawn inwardly and terminating in a small button 98, to permit the coils to be mounted on the frame by slipping them over this small end.

Now having described the invention and the preferred embodiment thereof, it is to be understood that the said invention is to be limited, not to the specific details herein set forth, but only by the scope of the claims which follow:

What I claim is:

1. In a machine for stripping the ends of insulated wires extending from articles of manufacture, the combination of two substantially parallel shafts revolving at high speed; cylindrical stiff brushes on said shafts adapted tangentially to engage the insulated wire ends from opposite sides so as to strip them; and stationary guards adjacent the brushes and extending substantially parallel to the shaft axes for movably supporting articles, said guards having depending sides adjacent and substantially parallel to each other and being so spaced from each other that the adjacent peripheries of the brushes project into a space which is in proximate alignment with the space defined by said depending sides so that the extending wire ends projecting into the space between said sides are properly guided between the brushes.

2. In a machine for stripping the end of insulated wires extending from articles of manufacture, the combination of two substantially parallel shafts revolving at high speed; cylindrical stiff brushes on said shafts adapted tangentially to engage the insulated wire ends from opposite sides so as to strip them; and stationary U- .-hap:d guards adjacent the brushes and extending substantially parallel to the shaft axes for movably supporting articles, adjacent legs of the U-shaped guards being substantially parallel to each other and being so spaced from each other that the adjacent peripheries of the brushes project into a space which is in proximate alignment with the space defined by said adjacent legs so that the extending wire ends projecting into the space between said adjacent legs are properly guided between the brushes, and said guards partially covering the brushes in such manner that the stripped insulation thrown off the brushes is directed by said guards in a certain direction so as not to impair proper supervision of the stripping operation by the operator.

3. In a machine for stripping the ends of insulated wires extending from articles of manufacture, the combination of two parallel shafts revolving at high speed; cylindrical stiff brushes on said shafts adapted tangentially to engage the insulated wire ends from opposite sides so as to strip them; and stationary guards adjacent the brushes and slightly inclined with respect to the shaft axes for movably supporting articles, said guards having depending sides adjacent and substantially parallel to each other and being so spaced from each other that the adjacent peripheries of the brushes project into a space which is in substantial alignment with the space defined by said depending sides so that the extending wire ends projecting into the space between said sides are properly guided between the brushes.

4. In a machine for stripping the ends of insulated wires extending from articles of manufacture, the combination of two parallel shafts .revolving at high speed; cylindrical stiff brushes on said shafts adapted tangentially to engage the insulated wire ends from opposite sides so as to strip them; and stationary guards adjacent the brushes, said guards being slightly inclined with respect to the plane through both shaft axes and extending parallel to a plane which is parallel to both shaft axes and at right angles to the first mentioned plane for movably supporting articles, said guards having depending sides adjacent and substantially parallel to each other and being so spaced from each other that the adjacent peripheries of the brushes project into a space which is in substantial alignment with the space defined by said depending sides so that the extending wire ends projecting into the space between said sides are properly guided between the brushes.

5. In a machine for stripping the ends of insulated wires extending from articles of manufacture, the combination of two parallel shafts revolving at high speed; cylindrical stiff brushes on said shafts adapted tangentially to engage the insulated wire ends from opposite sides so as to strip them; a frame for holding a group of articles side by side with the extending wire ends to be stripped lying in a plane; and stationary guards adjacent the brushes and slightly inclined with respect to the shaft axes for movably supporting the frame with a group of articles, said guards having depending fiat sides adjacent and substantially parallel to each other and being so spaced from each other that the adjacent peripheries of the brushes project into a space which is in proximate alignment with the space defined by said depending sides so that the extending wire ends of a group of articles projecting into the space between said sides are properly guided between the brushes.

6. In a machine for stripping the projecting ends of insulated wires of coils, the combination of two parallel shafts revolving at high speed, cylindrical stiff brushes on said shaft adapted tangentially to engage the insulated wire ends from opposite sides so as to strip them; a frame over which a group of coils is passed side by side with the projecting wire ends to be stripped lying in a plane, said frame including a portion larger in area than a coil and against which the foremost of the group of coils rests: and stationary guards adjacent the brushes and extending substantially parallel to the shaft axes for movably supporting a group of coils on the frame, said guards having depending fiat sides adjacent and substantially parallel to each other and being so spaced from each other that the adjacent peripheries of the brushes project into a space which is in proximate alignment with the space defined by said depending sides so that the projecting wire ends extending into the space between said sides are properly guided past the brushes, the frame being moved in such direction that the larger portion of the frame approaches the brushes whereby the entire group of coils is urged against said enlarged portion of the frame due to the resistance against movement offered by the rotating brushes to the wire ends to be stripped.

EDWARD W. COLLINS. 

